Description
A stack-based buffer overflow vulnerability exists in D-Link DIR-605L Wireless N300 Cloud Router firmware versions 1.12 and 1.13 via the getAuthCode() function. The flaw arises from unsafe usage of sprintf() when processing user-supplied CAPTCHA data via the FILECODE parameter in /goform/formLogin. A remote unauthenticated attacker can exploit this to execute arbitrary code with root privileges on the device.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| D-Link | DIR-605L | 1.12 – ≤ 1.13 | — |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.
Metasploit 1 module
-
D-Link DIR-605L Captcha Handling Buffer Overflow
exploit/linux/http/dlink_dir605l_captcha_bof
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
References
- https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/linux/http/dlink_dir605l_captcha_bof.rb exploit
- https://web.archive.org/web/20121012062554/http://www.devttys0.com/2012/10/exploiting-a-mips-stack-overflow/ technical-description exploit
- https://www.exploit-db.com/exploits/29127 exploit
- https://forums.dlink.com/index.php?topic=51923.0
- https://www.vulncheck.com/advisories/dlink-dir605l-captcha-handling-stack-based-buffer-overflow third-party-advisory